Karst Area Communities Structure Feature And Landscape Restoration In Southwest Of Guangxi

Karst landscape structure has a complex diversity of landscape connotation, as well as the ecological environment has natural simplicity, so you can promote eco-tourism, sightseeing, leisure and tourism and other recreational activities. Southwest Guangxi karst topography has certain characteristics, it is not only a rich strong attractive sightseeing scenic area, but also itself has a high scientific value.Due to the mass unreasonable development and utilization of human resources in karst areas, resulting in the growth and development of vegetation in these areas vulnerable and plant co mmunities recession, resulting in the the co mmunity Landscape deteriorated phenomenon, resulting in a series of ecological consequences. Southwest Guangxi Karst investigation and analysis and comprehensive evaluation of typical vegetation co mmunities on the basis of a reasonable landscape quality evaluation system for vegetation landscape optimization design, and plant co mmunity structure optimization measures to enhance the overall quality of the landscape. The results are as follows:(1) In32typical plots in Southwest Guangxi, according to the survy, there are444species of vascular plants, classified as105families and290genera; including ferns16families,21genera and40species; gymnosperms3families,3genera,3species; angiosperms,75families,226genera and349species.(2) Southwest Guangxi karst forest co mmunities affected by human activities lead to the most is seriously damaged. Only in the villages of the mountain, the longer closing hillsides to facilitate afforestation areas and nature reserves can be seen strong native forest co mmunities. Vegetation types of tropical monsoon forest, a small amount of subtropical evergreen broad-leaved forest. The plant has a typical tropical karst flora own unique characteristics, but also with the characteristics of the transition from tropical to subtropical. The tiliaceae euphorbiaceae, ankoh, ulmaceae, hemu branch, fabaceae such as the majority of species composition.(3)11indexes were selected for landscape quality assessment:The landscape beauty of (X1), Botanical composition (X2), Plant Hierarchy (X3), Main environmental quality (X4), Soil environmental quality (X5), Biological environment (X6), Social benefits (X7), Economic benefits (X8) as the main evaluation, southwest Guangxi the vegetation Landscape (Y) evaluation system. After statistical analysis, the derived model equation:Y=0.63631+2.7654X1+0.34753X2+0.38311 X3-0.00186X4+1.68765X5+1.6546X6+2.8766X7+1.7655X8; R=0.8976.(4) The optimization of degraded forests of measures were put forward: expansion of existing ecological forest area; take closing hillsides to facilitate change within the forest habitat, ecosystem restoration; stand improvement, maintaining ecosystem diversity; effect with effect Island afforestation, promotion of ecosystem forward succession; the use of translucent tending to promote the succession of the ecosystem.